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Title: IR2 aperture measurements at 3.5 TeV
Authors: Alabau Pons, C.
Arduini, Gianluigi
Assmann, Ralph W.
Bruce, Roderik
Giovannozzi, M.
Jowett, John M.
MacLean, E.
Muller, G. J.
Redaelli, Stefano
Tomas, Rogelio
Valentino, Gianluca
Wenninger, Jorg
Keywords: Large Hadron Collider (France and Switzerland)
Colliders (Nuclear physics)
Particle accelerators
Beta functions
Proton beams -- Measurement
Issue Date: 2012
Publisher: CERN
Citation: Alabau Pons, C., Redaelli, S., Muller, G., MacLean, E., Arduini, A., Wenninger, J., ... & Tomas, R. (2012). IR2 aperture measurements at 3.5 TeV (No. CERN-ATS-Note-2012-017 MD).
Abstract: Aperture measurements in the ALICE interaction region were carried out to determine a safe configuration of β ∗ and crossing angle for the 2011 heavy ion run. Proton beams were used at the end of the proton run, after the commissioning of the squeeze to β ∗ = 1 m in IR2. In this paper, the results of aperture measurements are summarised and the final collision configuration is presented. Results of parasitic measurements of the effect of non-linear triplet fields with large orbit bumps in the IRs are also summarised.
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